I came to look about the black spots since my laying hens have started showing these black spots on the combs. I have a T shaped run with the straight part of the T being divided into two separate areas by chicken fencing. The layers are on one side, and then I have some Silkies on the other, and the top of the T is also a Silkie area. Are the Silkies at risk because of the layers on the one side? Should I vaccinate all the Silkies? This is the dry form from what I can see, and it only appears to be in the comb or side of the beak. I don't think any Silkies have it, but it looks like nearly all the layers have it. I am also in SC, so I am interested in how the original flock of this thread did. I am not sure what to do! I have never had to vaccinate the chickens and I would hate to do it, unless it would save their lives. The chickens share a coop, but the layers are "upstairs" and the Silkies are below (think kids fort with floors), so they don't come into contact with each other, but it is the same coop. I would appreciate any help you can give! Thanks!